evertz X1201-AES4, Manual

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X1200 Series Router Manual
OVERVIEW
Revision 1.3.2
Page 1-9
facilitate identification of faulty equipment or cabling. One set of flags is associated with each
checkword, and the third is used to evaluate ancillary data integrity. The checkwords and flags
are combined into a special error detection data packet that is included as ancillary data in the
serial digital signal.
EMBEDDED AUDIO: Digital audio is multiplexed onto a serial digital video data stream.
GVG TEN-XL: A 10 x 1 router made by the Grass Valley Group. The serial control protocol used for this
router has become an industry standard. The control protocol used to control the Evertz 95XX
series routers is an extension of this protocol.
ITU: The United Nations regulatory body governing all forms of communications. ITU-R (previously
CCIR) regulates the radio frequency spectrum, while ITU-T (previously CCITT) deals with the
telecommunications standards.
ITU-R601: See CCIR601
PIXEL: The smallest distinguishable and resolvable area in a video image. A single point on the screen.
In digital video, a single sample of the picture. Derived from the words picture element .
RESOLUTION: The number of bits (four, eight, ten, etc.) determines the resolution of the signal.
Eight bits is the minimum resolution for broadcast television signals.
4 bits = a resolution of 1 in 16.
8 bits = a resolution of 1 in 256.
10 bits = a resolution of 1 in 1024.
SERIAL DIGITAL: Digital information that is transmitted in serial form. Often used informally to refer to
serial digital television signals.
SMPTE (Society of Motion Picture and Television Engineers): A professional organisation that
recommends standards for the film and television industries.
SMPTE 125M: The SMPTE standard for bit parallel digital interface for component video signals.
SMPTE 125M defines the parameters required to generate and distribute component video
signals on a parallel interface.
SMPTE 244M: The SMPTE standard for bit parallel digital interface for composite video signals.
SMPTE 244M defines the parameters required to generate and distribute composite video
signals on a parallel interface.
SMPTE 259M: The SMPTE standard for 525 line serial digital component and composite interfaces.
SMPTE 292M: The SMPTE standard for 1125 line serial digital high definition video interfaces.
SMPTE 299M: The SMPTE standard for embedding AES audio into SMPTE 292M serial digital
high definition video.
SoftSwitch

: An Evertz patent pending technology the eliminates audio pops and clicks due to
interruptions of the AES carrier. These interruptions are often caused by non-synchronous
switching of the inputs, or may be present from upstream devices. Embedded SoftSwitch

uses the same technologuy to remove pops and clicks from embedded audio.